S62: Fracture at wrist and hand level

S62.2: Fracture of first metacarpal bone

A fracture of the first metacarpal bone, involves a break in the first long bone of the thumb, the metacarpal. This type of fracture often happens as a result of direct trauma or injury to the hand, which can occur during sports, falls, or accidents. The first metacarpal is particularly at risk due to its role in thumb movement and grip strength. Symptoms typically include intense pain, swelling, and an inability to move the thumb effectively. The area may bruise, and the thumb may appear shorter or misaligned. In more severe fractures, there can be visible deformity where the bone has broken through the skin. Diagnosis commonly involves a physical examination, followed by X-rays to determine location and severity of the fracture.